Boiler.



W` H. WINSLOW` BOILER.

Y APPLlc/xrxon FILED Nov. 3. |910.

1,289,34@ Patented Dec. 31, 1918.

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W. H. WINSLOW.

Bone-R.

APPLICATION FILED NOV. 3, 9l0. l ,289,340. Patented Dee. 3l, 12H8.

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WILLIAM H. WINSLOW, 0F CHICAGO, ILLINOIS, ASSIGNOR T0 WINSLOW SAFETYHIGH? PRESSURE BOILER C0.

BOILER.

Specification of Letters Patent.

Application led November 3, 1910. Serial No. 590,512.

To all whom t may concern:

I Be it known that I, WILLIAM H. WrNsLow, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented a certain new and Improved Boiler, of which thefollowing is a full, clear, concise, and exact description, referencebeing had to the accompanying drawings, forming a part of thisspecification.

My invention relates to an improved form of boiler constructionparticularly adapted for high pressure and quick steaming, suchconstruction being characterized by means for superheating the steamproduced and also means for storing the steam in suflicient quantity tosupply unusual demands that may be made upon the boiler for shortperiods of time.

My invention is particularly adapted for the construction of smallportable boilers and consists of a first portion of the flash boilertype adapted to instantaneously convert Water into steam and a secondportion of tubular type adapted to superheat and store the steamproduced in the first portion.

My invention further consists in a novel construction of the tubularportion of the boiler by which a plurality of cells is employed whichmay have additional superheating means as desired or not. The cellsemployed may be related to each other in a number of different ways,depending upon the use to which the boiler is to be put and each cell ispreferably constructed so that it may be heated red hot without injury.This I accomplish by fusing the parts together by means of theoXyacetylene flame so that each cell constitutes practically a singlehomogeneous mass of metal not subject to change or injury by beingheated red hot and subsequently cooled by the introduction of water orsteam. My invention further contemplates a means by Which either or bothof the boiler portions above referred to may be connected for use. Vitsometimes being desirable to use one portion of the boiler and cut outthe other portion in case of accident. My invention also providesautomatic means for controlling the fire under the portions of theboiler so that steam of practically constant temperature and pressure isdelivered from the boiler.

The several drawings illustrating my invention are as follows:

Figure l shows partially in side elevation and partially in section, aboiler construction in which the cellular portion of the boiler iscentrally disposed and the flash portion is located around the cellularport1on.

Fig. 2 is a plan view of the parts shown in Fig. 1 with the cover of theboiler removed.

Fig. 3 shows in developed view a modified form of construction of flashcoil adapted for use in the construction shown in Figs. 1 and 2.

Figs. 4 and 5 show a construction similar to Figs. 1 and 2, the coilsand cells being differently connected.

Fig. 6 is an enlarged sectional view of one of the heating coils shownin Figs. 4 and 5 to illustrate the operation of the coil in producingsteam.

Fig. 7 shows in diagrammatic plan view a modified arrangement of coilsand cells that may be used.

Fig. 8 is a detail view showing the connection of the steam deliverypipe to one of the boiler cells.

Similar numerals refer to similar parts throughout the several views. f

In the construction shown in Figs. 1 and 2, the cells 14 are so disposedthat the flash portion 6b of the boiler may be constructed in the formof a circular coil surrounding such cells. In the construction shown theflash portion 6b consists of a small tube into which the water isintroduced at 7 a and conducted through successive convolutions of thetube 6b disposed one below the other until it reaches nearly the lowerends of the cells 14 after which it is conducted through similarconvolutions disposed just within the first set, the second.. set ofconvolutions being disposed in parallel relation within the first setimmediately outside of the cells 14. The steam and Water ldelivered fromthe flash portion 6b is conducted bv the pipe 15a to the central one ofthe cells 14. The steam delivered from the cells 14 is conducted by apipe 18a to a throttle valve 58 from which it is conducted-through thepipe 59a through the convolutions of a superheating coil 60a disposedaround the Iatented Dec. 31, 1918.v

lower ends of the cells 14 immediately above the lire produced by theburner 72. VSuperheated steam is delivered from the superheating coil-by a pipe 61 to the engine-to b e driven.

.In this construction three supporting members 73 are employed equallyspaced and secured to alternate ones of the outer row of cells 14. Thesesupports 73 consist of pipes which Vopen into the cells to which theymay be secured by fusion as a result of which they constitute water legsand are thus prevented from being burned by the fire passing aroundthem. Two of the supports 7 3 are closed at their outer ends while thethird one shown at the right in the drawings is connected with the valve74 toconstitute a blow-off connection for the boiler. Each of thesupports 73 may be similarly provided with a blow-off valve if desired.

In the modified arrangement shown in Fig. 3, the tube 6c is suppliedwith water at its lower end and delivers the heated water from its upperend into the header 75 from which the parallel tubestid extend in theinner series of convolutions to a header 76 at the lower end of theboiler from which the parallel tubes 6e disposed between the tubes 6dextend upward and constitute alternate ones of the inner series ofconvolutions and terminate in a steamv header 77 at the upper end of theboiler from which the steam is delivered by a pipe 15'PL to thesuperheating coil 60a, or if desired directly to the steam engine. Thetube 6'3 in this'modifica` tion constitutes the entire outer series ofconvolutions. As a result of this construction. the water after becomingheated to a certain degree is distributed uniformly between two parallelpaths in which it is further heated and it is then again mixed togetherand uniformly distributed to two other parallel paths disposed betweenthe iirst two paths mentioned. In this manner the water and steam ineach tube is heated to practically uniformity vand if any unbalancedconditions produce different temperatur-esili the several tubes, thereis a tendency to equalize the difference since the tubes conducting thewater and steam in one direction alternate and are in close proximity tothe tubes conducting the water and steam in the other direction.

As a means for protecting the flues used in constructing the cells 14 sothat they will not be attacked by -fthe steam or water in such cells, Ihave found it of advantage to treat'them as follows: The tubes are firstsand blasted outside and inside, preferably so that the surface is madeuniformly clean and the tubes are then coated by means of the well knownBower-Barft' process which produces a thin coating ofv magnetic oxid ofiron both outside and inside of the tubes.

The coatingof'oxid thug produced loerfectlypV protects the tubes fromcorrosion by the water and steam vand also protects thetubes inside fromthe attack Iof the fianies passing through them. It is also to be notedthat the coating of loxid on the tubes-,does notinterfere with fusingthem to the boiler heads by means of the oxyacetylene flame referred toabove. If desired the heads and shells of the cells may be similarlytreated by the Bower-Barff process.

As shown in Figs. 4 and 5, the cells 14 are arranged in a manner similarto that shown and described above in connection with Figs. 1 and 2. Inthis modification, however, the

cells 14 are surrounded bytwo coils (if and is admitted bythe pipe 7a totheA lower con-r volutions of the coil 6f, and the water thus admit-tedpasses up through the coil Gf, and is discharged from such coil by thepipe'Gh down between two of the cells 14 and yinto the lower end of thecoil 6g, through which it again passes upward through the successiveconvolutions of the coils 6g, and is de-V livered by means of the pipe6k, either as highly heated water or very wet steam, to

the header 75, by which it is delivered to the outer cells 14, theconnectors from Vthe header 75 connecting with these cells at theirupper ends as far as practicable from the center of the boiler.- Thewater and steam thus delivered to the outer cells pass between all ofthe flues in these Cells to reach the outlet openings connecting thesevcells with the central `cell 14, as a result of which the steam is indry and more or less superf heated condition by the time it reachessuoli central cell. The centraly cell 14vis provided with an outletconnection 76, in which the throttle valve 58 is located, and from thethrottle valve 58 a pipe 77 extends downs to a super-heating coil V60",the super-heated steamY being de-v w-ard between the cells 14 liveredfrom such coil by a pipe 61l connected' with the engine to besupplied.

The connection of thepipe 76 to the cell 14 is indicated in detail inFig. 8, inl which there is shown a reducing connection 78 having acomparatively lsmall opening 7 9 v for the passage of the into the pipe76'. has the effectof preventing an undue rush of steam into the pipe76, and thus anundue reduction of pressure in the central cell steamfrom the cell114- This small opening 79' 14, as a result of which thequality of the steam in the central cell 14 is maintained and dry steamis supplied by the pipe 77 to the super-heating coil 601.

It is desirable that the coil (3g be made of pipe larger than the coilf, so that ample space may be provided in the coil 6g as indicated inFig. 6 to accommodate any steam that is produced above the water flowingthrough thepipe. This separation of steam produced from the Wateriiowing in the convolutions of the coil 6g may readily occur, since theconvolutions are so nearly in a horizontal plane, and the steam thusseparated from the water may pass upward through the successiveconvolutions and be discharged into the header 7 5 in better separatedcondition than if the coil 6g were made of pipe of smaller diameter.

In the boiler arrangement indicated in Fig. 7, 8 cells 14 are employed,which are disposed in rectangular arrangement and provided with coilsaround them similar to those shown and described in connection withFigs. 4 and 5. In this modification the water delivered from the coilssurrounding the cells is communicated to a header 75a, which is inconnection with all but the two left-hand cells, such connectionsserving to deliver the water and steam from the header '75a to the innerportions of the cells from.

which the water and steam pass through the cells llo the deliveryopenings located near the outer portion of the cells to pipes 80 and 81,by which the steam and water are communicated to the left-hand cells 14,after passing through which they are delivered by a pipe 81a to thethrottle valve 58, and thus either to a superheating coil or not, asdesired, and to the engine to be driven. This arrangement of boiler isdesirable for certain constructions of vehicles upon which steam motivepower is employed.

It is to be borne in mind that in any modification in which the steampasses Copies of this patent may be obtained for ve cents each, byaddressing the through the throtle valve 58 before being superheated anddelivered to the engine the valve is controlled by a rod 58a extendinginto the boiler casing, as indicated.

It is to be understood that if desired battle plates 82 may be used withthe cellular portion of the boiler structure, as shown in Figs. 2 and 5,to effect a more uniform distribution of the fire through the tubes ofthe cells 14.

I have indicated above that the cells are preferably made by welding thetubes through the tube sheet and by welding the shell to the tube sheetor sheets in accordance with the teaching of my prior patents Nos.1046132 and 1046133, granted to me on December 3rd, 1912, and others.

While I have shown my invention in the particular embodiments hereindescribed, I do not, however, limit myself to this construction, butdesire to claim b-roadly any equivalents that may suggest themselves tothose skilled in the art.

What I claim is:

In a boiler, the combination of a casing, a boiler unit disposedtherein, a header communicating with said boiler unit, an inner coilsurrounding said boiler unit, said inner coil comprising a plurality ofconvolutions separated to allow the fire gases to pass therethrough,said inner coil communicating with said header, an outer coil comprisinga plurality of convolutions disposed substantially in contact with eachother to form a continuous wall between the casing and the inner coil,said Outer coil communicating with said inner coil, and a water supplyconnection communicating with said outer coil.

In witness whereof, I hereunto subscribe my name this 28th day ofOctober, A. D.

WILLIAM H. WINSLOW. Witnesses:

AIBERT C. BELL, LEONARD E. Bosma.

Commissioner of Yatents,

Washington, D. C.

